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The full English name of EVA is ethylene-vinyl acetate copolymer, and its chemical name is ethylene-vinyl acetate copolymer. Polymerization methods: high-pressure bulk polymerization (for plastics), solution polymerization (PVC processing aids), emulsion polymerization (adhesives), suspension polymerization.

　　EVA is a common type of midsole material in daily life. Products made from it have good softness, shockproof, anti-slip, and strong pressure resistance.

　　It has strong softness, chemical resistance and good elasticity, so it is widely used in various working fields. The application fields of EVA materials are summarized as follows:

　　1. EVA foam shoe material

　　Shoe materials are the most important application field of EVA resin in my country. In the EVA resin used in shoe materials, the vinyl acetate content is generally 15% to 22%.

　　Because resin blend foam products are soft, elastic, and resistant to chemical corrosion, they are widely used in the soles and interior materials of mid- to high-end travel shoes, hiking shoes, slippers, and sandals; in addition, this material is also Used in acoustic panels, gymnastics mats and sealing materials.

　　2. EVA film

　　The main use of EVA film is to produce functional shed films.

　　Functional shed film has high weather resistance, anti-fog droplet and thermal insulation properties. The shed film made by adding a certain amount of EVA resin not only has a high light transmittance, but also has a greatly improved anti-fog droplet performance, which can generally be exceeded 4 months.

　　In addition, EVA film can also be used to produce packaging films, medical films, laminated films, cast films, etc.

　　3. EVA wire and cable

　　With the continuous development of computer and network engineering, out of consideration for the safety of computer rooms, people are increasingly using halogen-free flame retardant cables and silane cross-linked cables.

　　Because EVA resin has good filler tolerance and cross-linkability, it is widely used in halogen-free flame retardant cables, semiconductor shielded cables and two-step silane cross-linked cables.

　　In addition, EVA resin is also used to make the sheaths of some special cables. The vinyl acetate content of EVA resin used in wires and cables is generally 12% to 24%.

　　4. EVA toys

　　EVA resin is also widely used in toys, such as stroller wheels, seat cushions, etc. According to statistics, Chinese toy manufacturers consume about 5,000t of EVA resin every year, and the trademarks used are basically the same as those used in shoe materials.

　　5. EVA hot melt adhesive

　　Hot melt adhesive with EVA resin as the main component is solvent-free, does not pollute the environment and is highly safe. It is suitable for automated assembly line production and is therefore widely used in wireless book binding, furniture edge banding, cars and household appliances. Installation, shoemaking, carpet coating and anti-corrosion coating of metal.

　　Hot melt adhesives mainly use varieties with a vinyl acetate content of 25% to 40%. Although there are products under this trademark in China, they have not been produced for a long time, so they are all occupied by imported materials.

　　6. Other EVA products

　　EVA resin is also widely used in fields such as inks, bags, and wine bottle caps. It is estimated that the consumption of EVA resin in these areas is no less than 15kt.